Molecular genetic analysis in mild hyperhomocysteinemia: a common mutation in the methylene-tetrahydrofolate reductase gene is a genetic risk factor for cardiovascular disease - Kluijtmans, L AJ; Van, den Heuvel LPWJ; Boers, G HJ; Stevens, E MB; Frosst, P; Van, Oost BA; Trijbels, F JM; Rozen, R; Blom, H J (Am J Hum Genet, 1996)